My parents went to Ireland and came back with a picture of a chair that my dad asked if I could make. From the research I did, I found it was called a traditional Irish Chair. Made from cherry.
I think they are very comfortable. I have made something similar using my wife's profile and everyone who sits on it express the chair forcing their back to sit in a therapeutic way.
I cut the bow into the back. I took one 9/4 thick board and glue two shorter pieces on each end to accommodate the profile, cut it on the band saw, and sanded smooth.